{"id":"F2006B02094","name":"AD/AC/36 Amdt 2 - Wing Front Spar Lower Cap - Inspection","slug":"ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":41324,"registerId":"commonwealth-F2006B02094-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/AC/36 Amdt 2 - Wing Front Spar Lower Cap - Inspection","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-description: CASA Airworthiness Directive\nmeta-generator: Aspose.Words for .NET 22.10.0\nmeta-keywords: Issue 11/1970,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Wing Front Spar Lower Cap - Inspection,36 Amdt 2\ntitle: Airworthiness Directive - AD/AC/36 Amdt 2 - Wing Front Spar Lower Cap - Inspection\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\nCOMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n \n\n![](image.001.png)  Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes\n\n \n\nAD/AC/36\n\nAmdt 2\n\n\nWing Front Spar Lower Cap - Inspection 11/70\n\n \n\nApplicability: All models 560E, 680 and 680E which do not embody an external or internal spar reinforcement extending to W.S. 127 approved by the Secretary.\n\n \n\nDocument: Aero Commander SB No. 92.\n\n \n\nCompliance: At or before 3000 hours’ time in service unless already accomplished.\n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n\n \n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard, narrow Airworthiness Directive focused on a specific structural inspection for a specific aircraft type. It has not expanded beyond its original safety purpose."},"complexity_factors":["Very short document (approximately 150 words of substantive content)","Only 1 defined term implicitly referenced ('time in service')","Single condition for applicability (absence of spar reinforcement to W.S. 127)","No cross-references to other legislation beyond the enabling Civil Aviation Regulations 1998","Simple compliance trigger (flight hours threshold)","No nested exceptions or conditional logic"],"plain_english_summary":"This CASA Airworthiness Directive requires owners/operators of Twin Commander 560E, 680 and 680E aeroplanes without an approved reinforcement to inspect the wing front spar lower cap (visual or detailed) by 3,000 flight hours. It implements Aero Commander Service Bulletin No. 92 because spar-cap cracking or corrosion could lead to catastrophic wing failure, so compliance is mandatory to ensure structural safety."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The provided text imposes an inspection requirement for specified models with a Secretary‑approved exemption for certain reinforcements. Although titled 'Amdt 2', the excerpt does not show any alteration of scope from an earlier version; no expansion or narrowing of affected aircraft or actions is evident in this document alone."},"complexity_factors":["Narrow applicability: only specific Twin Commander models (560E, 680, 680E) are affected.","Single mandatory action: one inspection requirement with a fixed compliance time (<= 3,000 hours TIS).","External technical reference: compliance linked to Aero Commander Service Bulletin No. 92, requiring consultation of that document.","Exemption mechanism: aircraft with internal or external reinforcement to W.S.127 are exempt only if approved by the Secretary, introducing administrative discretion.","Technical ambiguity risk: term 'extending to W.S.127' requires engineering interpretation.","Compliance responsibility: owners/operators bear cost and operational disruption to arrange inspections."],"plain_english_summary":"This Airworthiness Directive requires owners/operators of Twin Commander models 560E, 680 and 680E to have the wing front spar lower cap inspected according to Aero Commander Service Bulletin No. 92, unless the aircraft already has an internal or external spar reinforcement to W.S.127 approved by the Secretary. Compliance must occur at or before 3,000 hours’ time in service. Owners/operators pay for and arrange the inspection; the Secretary decides whether a reinforcement exempts an aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection","history":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection/history","analysis":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection/analysis","conflicts":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection/conflicts","importantCases":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection/important-cases","documents":"/api/acts/ad-ac-36-amdt-2-wing-front-spar-lower-cap-inspection/documents"}}